Which beverage is is fluorescent in UV light?

Sprite

milk

tonic water

pineapple juice

Tonic water is transparent in daylight. Under ultraviolet light, the quinine makes it fluorescent (pictured), even though it is present in a negligible concentration.

Luca Biaggi

beverageschemistrylightultraviolet

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Answers by country

Vietnam

88%

11%

the Netherlands

76%

11%

France

71%

14%

Switzerland

12%

10%

69%

Austria

11%

67%

14%

Germany

10%

11%

66%

10%

703

Australia

66%

14%

115

Canada

16%

63%

14%

Unknown

17%

60%

12%

the United Arab Emirates

20%

60%

Singapore

18%

59%

14%

the United States

17%

12%

51%

16%

832

Ghana

23%

50%

the Philippines

26%

12%

48%

10%

the United Kingdom

18%

14%

47%

17%

366

Poland

25%

14%

46%

13%

13096

Pakistan

20%

17%

46%

14%

120

Malaysia

27%

46%

19%

Nigeria

28%

13%

45%

12%

145

India

26%

16%

43%

10%

968

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